I can code you a exe that reassemble the roms if you want... However, i'll certainely have to see a part of each file to know what to do...
As far as I know they each EPROM is to hold only odd or even bytes, so I could definitely make a utility like that, but I'd need to see at least 2 first parts (the header). So like, GA.C04 and GB.C04, or GAME.C04 and GAME.C05. Let me know if you're interested.
You could make a program which outputs two files, one using even bytes from even files, one using even bytes from odd files, that would cover both bases since one of the two would be correct.
I have sent you a sample utility I just coded to combine GA.C04-07 and GB.C04-07 in a PM, let me know if it works.
Thanks Drx, I'll give it a shot later tonight. I'll PM you about some of the other stuff later. cheers, Mr. Rare.